On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A

Details On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003head....7.1010l&link_type=abstract

American Astronomical Society, HEAD meeting #7, #10.10; Bulletin of the American Astronomical Society, Vol. 35, p.612

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a detailed analysis of X-ray spectra from individual ejecta knots in the supernova remnant Cassiopeia A. The spectra are fitted to give the electron temperature, Te and (single) ionization age net. These quantities are compared with the predictions of self similar hydrodynamic models incorporating time dependent ionization and radiation losses, and Coulomb electron-ion equilibration behind the reverse shock for a variety of different ejecta density profiles described by a uniform density core and a power law envelope. We find that the ejecta close to the ``jet'' region in the NE, have a systematically shallower outer envelope than ejecta elsewhere in the remnant, and we interpret this as being due to more energy of the initial explosion being directed in this polar direction as opposed to equatorially. The degree of asymmetry we infer is at the low end of that modelled in asymmetric core-collapse simulations, and may be used to rule out highly asymmetric explosions, as have been suggested, for example, in connection with 44Ti nucleosynthesis. Work supported by Basic Research Funds of the Office of Naval Research.

Affiliated with

Also associated with

No associations

Rating

On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-998989